PrePleat 40 Extended Surface Pleated Filters

Flanders Pre Pleat 40 extended surface pleated filters are designed to operate in nearly every type of installation.

Available in 1-inch, 2-inch, and 4-inch nominal thickness, these filters have an average atmospheric dust spot efficiency range of 25-30% per ASHRAE Standard 52.1 test methods. Pre Pleat 40 filters offer greater efficiency and service life than disposable filters, pad and frame systems, or metal washable filters. The overall design of this product makes these filters the accepted choice in applications requiring high performance and extended service.

Important Features

Media maximizing v-pleat design
Expanded metal grid prevents media flutter while in operation
Diagonal and horizontal support members provide frame strength
Filter media pack sealed to eliminate air bypass
Average ASHRAE efficiency is 25-30%
Average arrestance is 90-92%

These filters are suitable for variable air volume systems. Operating face velocity ranges are from 0 to 500 fpm for 1 in. and 2 in. filters, and from 0 to 625 fpm for 4 in. filters. Standard and High Capacity designs are offered.

Pre Pleat 40 filters are UL 900 Class 2 listed but are available with UL Class 1 listing.

Most heating, air conditioning, or ventilating systems can be upgraded with the use of Pre Pleat 40 filters in place of existing flat panel types.

The inherent strength of the filter allows for easy changeout as it will not collapse, warp, or bend in normal service.

Prepleat 40 filters are available in a wide range of sizes and will fit most commercial and industrial installations with little or no system modification. Fasteners are available to adapt the filter to existing filter banks.

Pre Pleat 40 pleated filters are suitable as primary filters and can be installed in Type 9 Holding Frames, K-Trac Framing Modules, Surepleat Side Access Housings and similar existing hardware. These filters may be used as prefilters for Precision Pak, PrecisionCell and Rigid-Air filters in these framing systems and in Sureseal Side Access Housings.

Flanders Precisionaire's unique v-pleat wedge pleat allows for total media usage and provides maximum air flow and dust holding capacity.

Construction

Filter frames are constructed from pieces of die-cut, moisture-resistant carrier board. Components "telescope" into one another and provide double-wall construction and a precision fit.

The frame includes diagonal and horizontal support members bonded to the media on the air entering and elaving sides for unsurpassed frame strength. Locking corners and positive media-to-frame seal reduces the possibility of air bypass.

The filter media is a high-loft, reinforced, non-woven cotton/synthetic blend. It is continuously laminated to an expanded metal grid on the air leaving side to provide pleat stability throughout the life of the filters and to prevent media flutter while in operation.

Flanders Precisionaire's v-pleat design insures that the greatest media area is exposed to the air flow to promote uniform dust loading. Competitive filters cannot maintain this rigid shape and tend to flatten out, using only a portion of the media.

This v-pleat design creates an air exit area (B) equal to the air entering area (A), which minimizes end losses and reduces pressure drop.

Radial wedge pleats have unequal air exit (D) and air entering (C) areas, which cause higher resistance and uneven use of media.

Notes:

PD represents clean pressure drop in inches w.g. The recommended final pressure drop for all models is 1.0 in. w.g. System design may dictate a lower change-out point.
Actual filter face size for 12 x 24 and 24 x 24 filters is 5/8 in. under on height and width. Actual face size on all other sizes is 1/2 in. under on height and width.
Actual filter depth is 1/8 in. under for all nominal 1 in. deep filters. Actual filter depth is 1/4 in. under for all nominal 2 in. and 4 in. deep filters.
For capacities other than those shown, ratio the face velocities.
Performance tolerances conform to Section 7.4 of ARI Standard 850.

	Pre Pleat Class 1 air filters are designed for applications where a UL Class 1 fire rated filter is required and metal frames are unsuitable.
	Pre Pleat HT air filters are designed for applications where the temperatures " reach up to 500 degrees F.
	Pre Pleat HV air fitlers are designed to operate in high velocity and turbulent air applications where standard pleated filters tend to fail.
62R high efficiency pleated air filters contain an electrostatically charged filtration media which has a higher dust holding capacity.